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Spanner buying guide: length, jaw, then the job

Updated: 22 October 2026

You are about to buy a first spanner for a UK flat, a bike, or the boot of a car, and the title says 150 mm. That figure is the handle on a normal adjustable, not the gap that has to fit the nut, and a chrome-vanadium line does not tell you whether the jaw will hold. This spanner buying guide puts those two numbers in order, then matches the type to a job you will actually repeat. The eleven tools and the captured prices are on the [spanner comparison](/hub/hand-tools/spanner). Peter F. compared those amazon.co.uk listings. There was no lab measurement. Prices can change. A purchase through our links may earn a commission at no extra cost to you.

You are about to buy a first spanner for a UK flat, a bike, or the boot of a car, and the title says 150 mm.

Our top picks

Stanley Stanley MaxSteel 200 mm adjustable

Best overall

Stanley Stanley MaxSteel 200 mm adjustable
6.9/10about £7.99
View offer
Hilka Hilka 11-piece metric combination set

Rank 2

Hilka Hilka 11-piece metric combination set
7.3/10about £8.68
View offer
SOL SOL 6-piece double-ended metric set

Best value

SOL SOL 6-piece double-ended metric set
6.2/10about £4.79
View offer
On this page
  1. 1.Read the length and the jaw as two figures
  2. 2.Pick the type for the job you will repeat
  3. 3.What the steel line and a standard stamp prove
  4. 4.Price bands, then the packet

Read the length and the jaw as two figures

On an adjustable the stamped length is the lever, not the opening. A 150 mm tool is a short handle, 200 mm the usual single, and 250 mm fouls a basin cupboard. RS treats size as the fastener and length as leverage. One printed number still does not tell you the jaw. Navegando's 150 mm bullets say 6–19 mm and a jaw field says 0.75 inches. Stanley's 200 mm bullet says 24/200 mm while the capacity field says 8 inches. Leave a conflicting field unknown, and do not borrow a 20 mm jaw from a tool that is not in this set.

Pick the type for the job you will repeat

An adjustable has a fixed jaw and a jaw on a worm. ManoMano's UK guide says that movement is a poor way to tighten a small bolt hard, and reviews here say cheap adjustables open as you turn. The fork is on adjustable or combination. Hilka's combination set, at £8.68, lists 6, 8, 10, 11, 12, 13, 14, 15, 17, 18 and 19 mm, and skips 7, 9 and 16 mm. SOL, at £4.79, is double-ended from 6 mm to 17 mm. A highlight calls those combination spanners. The title does not. The Ginddy is 13 mm only, with no reviews. Jiayoha is a 34 mm and 40 mm basin tool with two.
Stanley Stanley MaxSteel 200 mm adjustable

Testsieger

Stanley Stanley MaxSteel 200 mm adjustable
6.9/10about £7.99
View offer

What the steel line and a standard stamp prove

Chrome vanadium is a steel name, not a test of play. Hilka's field and bullets disagree on the finish, and one reviewer says nickel plated. Stanley's 200 mm bullet says chrome vanadium and the materials field says alloy steel. QWORK says carbon steel. SOL says metal. None of these files print ISO 6787, ISO 3318 or ISO 1711-1. An RS PRO elsewhere, at £14.50 including VAT, states ISO 6787. Do not borrow it. Navegando's 164 Nm and QWORK's 520 Nm are listing lines, not tests in this file.

Price bands, then the packet

On 19 October 2026 the shelf ran from about £4.79 to £13.99. The £13.99 pair is QWORK's three-piece set, 4.5 from 91 ratings, and the WORKPRO 200 mm, a 42 mm jaw and 4.5 from 4,328. Two reviews at 5.0 are not a larger sample than 4.6 from thousands. Named picks are on the best spanner page. Hilka packets arrive with a duplicated size and a missing neighbour, and the rack breaks. QWORK's jaw field says 20 mm while the bullets say 20, 25 and 30 mm. A missing listed size can be rejected within 30 days under the Consumer Rights Act 2015.

Common questions

Is 150 mm the jaw or the handle?
On a normal adjustable, 150 mm is the overall length unless a second figure states the jaw. In this set the Navegando and the WORKPRO 150 mm are 150 mm handles. Their openings are separate lines: 6–19 mm on the Navegando bullets, and about 24 mm on the WORKPRO field, with a 25 mm highlight that does not agree.
Do I need a set or one adjustable?
Buy one adjustable when the next nut is an unknown size or wider than a small metric run. Buy a combination set when you will meet the same sizes again and you want a ring end. One adjustable does not retire the set, because the moving jaw slips sooner on a tight bolt. In this shelf the Hilka set is the combination row and the Stanley 200 mm is the large-sample adjustable.
Does chrome vanadium mean the jaw will not slip?
No. Chrome vanadium is a material line, not a test of play. Reviewers of the cheap adjustables here still report worms that open under load, including on tools whose listings name chrome vanadium. None of these amazon.co.uk files print ISO 6787 or ISO 1711-1. A soft grip does not close that gap.
What sizes should a first metric set include?
For a modern bike, flat-pack furniture and a lot of car-boot work, the sizes that come up are the even millimetres from 8 mm to 19 mm, plus 11 mm and 13 mm. Hilka's bullets cover much of that and skip 7, 9 and 16 mm. SOL covers 6 mm to 17 mm as open-ended pairs and stops before 18 mm and 19 mm.
Why does a cheap set arrive with two of one size?
Because a printed list is not the same as the packet. Hilka reviews in this file describe duplicated sizes and a missing neighbour, and a rack that breaks or will not hold the tools. Count them against the bullets when the parcel arrives. If a listed size is absent, the Consumer Rights Act 2015 gives a 30-day short-term right to reject goods that are not as described.
When is a tap spanner a different purchase?
When the nut is a basin or tap fitting around 34 mm or 40 mm in a cupboard a normal head will not enter. Jiayoha's listing is that specialist tool, with two reviews and a loosely worded contents line. It is not a substitute for a metric combination set, and a 5.0 from two ratings is not a reason to prefer it for a bike or a car.

Related pages

Metric or AF spanner

Spanner

Adjustable vs combination spanner: when each one wins

Best spanner UK: bath, bike, boot, and who to skip

How to use a spanner: seat, pull, and when to stop

Sources

Public UK and standards sources listed below, as used in the digest. Shelf prices and star lines are the amazon.co.uk figures dated 19 October 2026, not a fresh check on 22 October 2026.

  1. HSE, PUWER overview (retrieved 19 October 2026)
  2. University of Essex, Using hand tools safely (retrieved 19 October 2026)
  3. ISO 1711-1:2019, hardness and test torque (retrieved 19 October 2026)
  4. ISO 3318:2016, maximum head widths (retrieved 19 October 2026)
  5. RS, adjustable spanners guide (retrieved 19 October 2026)
  6. RS PRO 541-6573 adjustable wrench (retrieved 19 October 2026)
  7. GOV.UK trade tariff, heading 8204 (retrieved 19 October 2026)
  8. Trading Standards, Consumer Rights Act goods guidance (retrieved 19 October 2026)